NVIDIA uploaded the GeForce 451.48 WHQL "Game Ready" drivers, you can grab them over here. Among other things, this driver offers full DirectX 12 Ultimate support, hardware-accelerated GPU scheduling support, and it fixes some bugs.
Game Ready for DirectX 12 Ultimate
The new Game Ready Driver provides full support for the new DirectX 12 Ultimate graphics API.
This includes support for DirectX Raytracing (DXR) version 1.1 as well as support for mesh
shaders, sampler feedback, and variable-rate shading (VRS). Additionally, this driver supports
Hardware-accelerated GPU Scheduling when used with the Windows 10 May 2020 Update.
New Features and Other Changes:
Supports DirectX 12 Ultimate
Supports Vulkan 1.2
Supports hardware-accelerated GPU Scheduling.
Supports CUDA 11.0
[Just Cause 2]: The game does not detect CUDA files which results in missing "GPU Water
Simulation" and "Bokeh Filter" settings. 
[Sea of Thieves]: Issues with game rendering occur. 
[Resident Evil 2 Remake]: The game may display random object and menu flickering.
[Devil May Cry 5]: The game may display random object flickering. 
[Divinity Original Sin 2 - Definitive Edition]: The game experiences low performance when
hardware accelerated GPU scheduling is enabled. 
[Notebook]: Windows Mixed Reality headsets may display jitter when connected to the HDMI
port linked to the NVIDIA Optimus notebook integrated graphics. 
[G-SYNC]: G-SYNC does not work with DirectX 9 games if "Disable full screen optimizations"
is selected. 
Display brightness increases while enabling GPU scaling. 
NVIDIA HD Audio may disappear after display goes to sleep. 
The cursor turns into a grey rectangle when playing YouTube 4K HDR videos.